Answer:
All 2 gallons per minutes
Explanation:
0 minutes : 40 gallons
4 minutes : 32 gallons
12 minutes : 16 gallons
20 minutes : 0 gallons
0 minutes to 4 minutes change (40-32=8) gallons
- it changes 8 gallons divided by (4-0=4) minutes = 8/4 = 2 gallons per minutes
4 minutes to 12 minutes change (32-16=16) gallons
- it changes 16 gallons divided by (12-4=8) minutes = 16/8 = 2 gallons per minutes
0 minutes to 20 minutes change (40-0=40) gallons
- it changes 40 gallons divided by (20-0=20) minutes = 40/20 = 2 gallons per minutes